Multiplayer games on disc: Gears of War 3, Halo Reach (+ all DLC), Left 4 Dead 2 (+ all DLC), Portal 2, Borderlands (+ all DLC), The Orange Box, Rock Band 3 (+ like 400 USD in DLC; don't have a keyboard controller, though), Rock Band 2 (I haven't traded this yet, for some reason)